Chapter 35- Nervous System Flashcards Preview

Biology > Chapter 35- Nervous System > Flashcards

Flashcards in Chapter 35- Nervous System Deck (26):
1

Anatomy

The science of the shape and structure of organisms

2

Cells

The structural and functional units of all living organisms

3

Organ

A group of different tissues with a specific job

4

Organ system

A group of organs that work together to perform a specific job

5

Homeostasis

The ability of an organism or cell to maintain homeostasis

6

What is the function of the nervous system

It receives and then sends out information about your body. It also monitors changes and keeps the heart beating

7

Neuron

Specialized cell transmitting nerve impulses. It’s electrical and chemical. The messages that are constantly traveling through your body are carried by neuron or nerve cell

8

Explain resting and action potential

There are resting spots on axons there are also sodium and potassium pumps on the axons. The sodium/potassium ions becoming negative and positive create nerve impulses. When the sodium channels close The potassium ions leave which make the action potential crash. The action potential occurs at depolarization

9

The synapse

The axon terminal meets another neuron at dendrites

10

3 types of neurons

Sensory
Interneuron
Motor

11

What do the sensory neurons do

They conduct impulses toward the brain/spinal cord

12

The brain

Is a organ of soft nervous tissue that functions as the coordinating center of sensation and intellectual and nervous activity. It’s covered in 3 layers of connective tissue that nourishes and protects it called the meninges. The cerebral fluid is found there

13

Two main divisions of nervous system

Peripheral
Central

14

The peripheral system

Outside the central nervous system. It includes the cranial nerves, spinal nerves, and the ganglia

15

The two parts of the peripheral system

1. Sensory division
2. Motor division

16

The sensory division

Impulses go from sense organs to central nervous system

17

The motor division

Impulses go from the central nervous system to muscles and glands

18

Two parts of motor division

1. Somatic nervous system; conscious controlincludes movement of skeleton and muscles
2. The autonomic system; unconscious control

19

Sensory receptors

Cells that recieve messages from their surroundings

20

What does the autonomic nervous system control

The heart rate, blood flow, stimulates sweat and adrenal glands and peristalsis

21

What are the sense organs

Eyes
Nose
Mouth
Inner ears
Skin

22

5 types of sensory receptors

1. Pain receptors: respond to damaged cells
2. Thermoreceptors: in skin, body core, and hypothalamus
3. Mechanoreceptors: in skin, skeletal muscles, and inner ears
4. Chemoreceptors: in the nose and tastebuds
5. Photoreceptors: in eyes

23

The eyes are

Organs that detect light and convert it to electrochemical impulses in neurons

24

Two types of photoreceptors

Rods and cones

25

Largest sense organ

Skin

26

What parts of the body have the greatest number of touch/pressure receptors is

Fingers toes and the face