Panopto 23/24

Question 1

What gives us our nervous system?

Answer 1

nervous tissue

Question 2

what does the nervous system work with?

Answer 2

endocrine system

Question 3

what is the NS+ES called?

Answer 3

communication network

Question 4

what are the 2 parts of the nervous system?

Answer 4

central nervous system (CNS): brain and spinal cord
peripheral nervous system (PNS): ganglia, nerves and receptors

Question 5

nature of the communication NS?

Answer 5

electrical messages called action potentials. Action potentials travel over nerve cell circuits and elicits an immediate response, and it ends quickly.

Question 6

nature of communication ES?

Answer 6

chemical messages called hormones that are carried by the blood. They elicit a delayed response and are long lasting

Question 7

what does the PNS do with messages?

Answer 7

Carries messages to CNS (afferent NS: sensory in function)
Receives messages from the CNS (efferent NS: motor in function)

Question 8

Is the afferent nervous system homogeneous or heterogeneous?

Answer 8

homogeneous, no variability

Question 9

Is the efferent nervous system homogeneous or heterogeneous?

Answer 9

heterogeneous; it has 2 parts. the somatic and autonomic NS

Question 10

Somatic NS name the type of muscle and voluntary or involuntary.

Answer 10

skeletal muscle- voluntary

Question 11

Autonomic NS name the type of muscle and voluntary or involuntary.

Answer 11

smooth/cardiac muscle, glands- involuntary

Question 12

name the 2 parts of the autonomic NS and their location and function

Answer 12

Sympathetic NS- location: mid portion of the spinal cord, function: stress
Parasympathetic NS- location: upper and lower portion of the spinal cord and the brainstem; function: resting activities (rest and digest)

Question 13

what is nervous tissue made of

Answer 13

Nerve cells and supporting cells- glial cells or neuroglial (support nerve cells)

Question 14

what is a synonymous term for a nerve cell

Answer 14

neuron

Question 15

what part of a nerve cell does a fiber refer to

Answer 15

the axon

Question 16

how many nerve cells do we have and are they all the same?

Answer 16

10 billion, no they are not the same we can divide them based on function and location

Question 17

name the 3 kinds of neurons

Answer 17

motor neurons, sensory neurons, and interneurons

Question 18

motor neurons: afferent or efferent?

Answer 18

efferent

Question 19

sensory neurons: afferent or efferent?

Answer 19

afferent

Question 20

What’s another name for interneurons?

Answer 20

association neurons

Question 21

what is the most abundant neuron?

Answer 21

interneurons

Question 22

what are the releasing neurotransmitters?

Answer 22

acetylcholine and norepinephrine

Question 23

do the somatic and autonomic nervous systems have acetylcholine, norepinephrine, or both?

Answer 23

Somatic nervous system: only acetylcholine
Autonomic nervous system
Sympathetic: has both acetylcholine and norepinephrine
Parasympathetic: has only acetylcholine

Question 24

describe multipolar neurons, bipolar neurons, and pseudo-unipolar

Answer 24

Multipolar: 1 axon and 2 or more dendrites (most abundant)
Bipolar: 1 axon and 1 dendrite: rare seen where we have special senses (eye, ear and nose)
Pseudo-unipolar: 1 axon (with 2 branches) and 0 dendrites

Question 25

what neruon/s are multipolar

Answer 25

motor neurons and interneurons

Question 26

what neuron/s are psuedo-unipolar?

Answer 26

sensory neurons