10+

Question 1

The cytoplasmic extensions that, together with the cell body, provide the main receptive surfaces for neurons are

Answer 1

Dendrites

Question 2

Masses of myelinated nerve fibers appear

Answer 2

White

Question 3

Which of the following is a type of neuroglial cell?
Astrocyte
Oligodendrocyte
Ependymal cell

Answer 3

All of these are correct

Question 4

What are three types of neuroglial cells?

Answer 4

Asrocytes, oligodendrocytes, and Ependymal cells

Question 5

List the parts of a reflex arc.

Answer 5

Receptor, sensory neurons, inter neuron, motor neuron, effector

Question 6

When a nerve fiber is polarized, the concentration of sodium ions is ____ while potassium ion are ______

Answer 6

Higher on outside of membrane

Potassium ions are higher on inside

Question 7

Saltatory conduction is

Answer 7

Faster than conduction on an unmyelinated fiber

Question 8

What produces myelin in the brain and spinal cord?

Answer 8

Oligodendrocytes

Question 9

Thick and myelinated cells allow things to

Answer 9

Travel faster

Question 10

What passes through cell membranes most readily? (Neuroglial cells)

Answer 10

Potassium

Question 11

Most of the neurons in the brain and spinal cord are

Answer 11

Multipolar

Question 12

Reflexes help control what three things

Answer 12

Heart rate
Blood pressure
And digestive activities

Question 13

Three general functions of the nervous system are

Answer 13

Integrative, motor, and sensory neurons

Question 14

Neurons are

Whereas neuroglial cells are

Answer 14

Nerve cells

Structural and functional units of the nervous system

Question 15

What is myelin?

Answer 15

A lipoprotein on the outside of the axon

Question 16

The somatic nervous system controls

Answer 16

Skeletal muscle contraction

Question 17

What is under voluntary control of the nervous system?

Answer 17

The skeletal muscle system

Question 18

When a stimulus is great enough to change the membrane potential and propagate an action it is called

Answer 18

Threshold potential

Question 19

Nodes of ranvier occur between

Answer 19

Myelin sheaths

Question 20

What is a reflex?

Answer 20

An automatic unconscious response to changes occurring inside or outside of the body

Question 21

Outside of the brain and spinal cord, myelin sheaths of —– cells often enclose larger axons

Answer 21

Schwann

Question 22

What occurs when you enter a room and smell a strong odor which fades?

Answer 22

Sensory adaptation

Question 23

Olfactory receptors are

Answer 23

Chemoreceptors

Question 24

5 primary taste sensations

Answer 24

Sweet, salty, sour, bitter, and umami

Question 25

Loss of smell is called

Answer 25

Anosmia

Question 26

Acupuncture relieves pain by releasing

Answer 26

Enkephalins

Question 27

Treatment for cataracts usually involves the removal of the

Answer 27

Lens

Question 28

Most common cause of deafness

Answer 28

Torn tympanic membrane

Question 29

Glaucoma is caused by a

Answer 29

Build-up of aqueous humor

Question 30

Special senses are found

Answer 30

In the head

Question 31

Light touch receptors are

Answer 31

Tactile corpuscles

Question 32

Deep pressure receptors

Answer 32

Lamellated corpuscles

Question 33

Lacrimal glands

Answer 33

Produce tears

Question 34

Thin and myelinated pain fibers | Vs thick and unmyelinated

Answer 34

Acute | Chronic

Question 35

Rods are more/ less sensitive to light than cones

Answer 35

More | Cones for color

Question 36

Rhodopsin is broken down by light into

Answer 36

Ops in

Question 37

Pain receptors are generally stimulated by

Answer 37

Factors that can cause nerve damage

Question 38

Taste receptors are

Answer 38

Modified epithelial cells

Question 39

Lens of eye thickens when the

Answer 39

Ciliary muscles contract

Question 40

Rhodopsin is found in

Answer 40

Rod cells

Question 41

Temperature sensation depends on two types of

Answer 41

Free nerve endings

Question 42

Dermal papillae are

Answer 42

Modified epithelial cells

Question 43

The Eustachian tube connects the

Answer 43

Middle ear to the throat

Question 44

Percentage of solids in blood

Answer 44

45% | 55% plasma

Question 45

Biconcave cells in blood that lack nuclei when mature

Answer 45

Red blood cells

Question 46

Normal white blood cell count is

Answer 46

5,000-10,000 cells/ mm3 of blood

Question 47

Platelets are

Answer 47

Cytoplasmic fragments of cells

Question 48

Platelets release vasoconstricting substances called ____ when forming a plug

Answer 48

Serotonin

Question 49

Sickle-cell anemia is caused by an

Answer 49

Abnormal form of hemoglobin

Question 50

Pulmonary embolism comes from a clot reaching a lung through

Answer 50

A pulmonary artery

Question 51

Thrombocytopenia is due to

Answer 51

A deficiency of platelets

Question 52

Final formation in blood clot formation is

Answer 52

Thrombin converts fibrinogen to fibrin

Question 53

What lack nuclei, release serotonin, and number from 130,000-360,000/mm3 blood?

Answer 53

Platelets