lecture 4 Flashcards by Evelin Marquez

what is the orbicularis oculi

encircles eyelids

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which flat muscle covers the forehead and raises the eyebrows (for a surprised look)

frontails

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schwann cells and oligodendrocytes

synthesize myelin sheath of neurons in the brain, spinal cord, and peripheral nerves

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This muscle lies along the posterior surface of the upper am; it extends the forearm and is used to bear weight in crutch walking

triceps brachii

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The gastrocnemius and the soleus are commonly called the

Toe dancers muscles

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which of the following is the type of nervous tissue that conducts a nerve impulse

neuron

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Which is true of both the occipital and temporal lobes? Both

are cerebral lobes

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csf circulates through all of the following structures except the

foramen magnum

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Which of the following is true of the chewing muscles

must be attached to the mandible

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Which of the following forms cross-bridges with actin

myosin

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With regard to the action potential,

the efflux of K+ causes repolarization.

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which group of muscles moves the arm. at the shoulder

rotator cuff muscles

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this muscle flattens the cheek and positions the food between the teeth

buccinator

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which of the following describes actin and myosin

all of the above

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Which of the following is responsible for muscle relaxation

Calcium is pumped back into the sarcoplasmic reticulum

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This structure is part of the diencephalon; it regulates the anterior pituitary gland, water balance, appetite, body temperature, and the autonomic nervous system.

hypothalamus

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Which of the following is located within the subarachnoid space?

cerebrospinal fluid

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The quadriceps femoris group and the hamstrings

Lie along the thigh

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The medulla oblongata descends into the vertebral cavity through the

foramen magnum.

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The rectus femoris, vastus lateralis, vastus medialis, and vastus intermedius

Are the muscles of the quadriceps femoris

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With which of the following is the parietal lobe most associated?

Somatosensory area

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what best describes a sphincter muscle

encircle

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the somatic motor neuron

causes release of ACh into the NMJ

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The medulla oblongata is

all of the above

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Which of the following "muscle words" refers to the chest

Pectoralis

The inside of the unstimulated neuron is negative; this electrical charge is caused by the outward leak of potassium and is called

the resting membrane potential.

What is the fatty insulating material that surrounds the axons?

Myelin

which of the following does not refer to the thin filament

myosin

Which of the following contains cerebrospinal fluid?

Subarachnoid space

What is the name of the first phase of the action potential that is caused by the inward movement of sodium?

Depolarization

the calf muscle (gastrocnemius) attaches to the calcaneus by the

achilles tendon

actin is

thin filament

The corpus callosum

connects the right and left hemispheres.

Which of the following is true of the diencephalon?

Contains the thalamus and hypothalamus

the purpose of myoglobin is to

store oxygen

The orbicularis oris muscle

Surrounds the mouth

Which of the following is not descriptive of the medulla oblongata?

"Executive" function

which of the following words means muscle weakness

myasthenia

Cerebrospinal fluid (CSF)

all of the above

Neurotransmitters

All of the above are true.

Which type of muscle requires stimulation by a somatic motor neuron

skeletal

which contractile protein does calcium bind

Troponin

With regard to an action potential, the rapid efflux of K+

restores the internal negativity of the neuron.

What is the name of the cord of connective tissue that connects muscles to bone

Tendon

Which of the following is true of the occipital lobe?

Contains the primary visual cortex

Which muscle is located on the posterior area of the body

Latissimus dorsi

The depression between the convolutions of the cerebrum is called a

sulcus.

The biceps femoris, semitendinosus, and semimembranosus

Are the hamstrings

Which group of muscles is located on the posterior thigh

Hamstrings

the "maters" are

meninges

the pituitary gland sits beneath the

hypothalamus.

The smiling muscle is the

Zygomaticus

Contraction of the right sternocleidomastoid muscle

Rotates the head to the left

The levator palpebrae superioris

raises eyelids

The rectus, transversal, internal oblique and the external oblique refer to

Abdominal muscles

site of calcium storage in a relaxed skeletal muscle

sarcoplasmic reticulum

acetylcholine is released from the neuron's membrane in response to the

nerve impulse

The cerebral spinal fluid

cushions the brain, delivers nutrients to the brain, and removes wastes.

Which muscle separates the thoracic and abdominal cavities and is also the chief breathing muscle

diaphram

clinically, an elevated. blood level of creatine phosphate is indicative of

muscle damage

Which of the following is the middle layer of the meninges and looks like a spiderweb?

Arachnoid mater

The midbrain, pons, and referred to as the

brain stem

what is the stimulus for the release of ach from the prejunctional membrane

nerve action potential

The brachialis and brachioradialis

Flex the forearm at the elbow

a tendon is

attaches muscle to bone

What is the function of the masseter muscle

chews food

the muscle of mastication must insert on the

mandible

the frontal temporal occipital and parietal lobes form the

cerebrum

The occipital lobe

contains the primary visual cortex

which muscle if described as striated and involuntary

cardiac

the choroid plexus

is the site where cerebrospinal fluid is formed

The medulla oblongata descends as the

spinal cord

Which muscle are you using as you turn your head to the left then to the right

Sternocleidomastoid

Which of the following is not a facial muscle

Sternocleidomastoid

Which of the following best describes the arachnoid mater?

Meninges

There are four major areas of the brain: the cerebrum, diencephalon, brain stem, and

cerebellum.

Which muscles are located between the ribs and help move the rib cage during breathing

Intercostal muscles

The surface of the cerebrum is folded into elevations that resemble speed bumps; these speed bumps are called

convolutions, or gyri.

Myelination of the axon

increases the speed of the nerve impulse along the axon.

Which structure plays a key role in personality development and emotional and behavioral expression and carries out the "executive" functions?

Frontal lobe

What makes white matter "white"?

myelin

Which muscle is located in the lower extremities

Peroneus longus

Which of the following is true of myelination?

Increases the speed of the action potential along the axon

As the electrical signal travels trough the T tubules, I️t causes the

Release of calcium from the sarcoplasmic reticulum

Injury to the occipital lobe is most likely to cause

loss of vision

The temporal lobe

contains the primary auditory cortex

The pituitary gland is connected to

the hypothalamus.