Answered: Please answer both questions: 1) The…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Please answer both questions:

1) The sodium-potassium pump:

a) equalizes the charge distribution across the cell membrane.

b) transports K+ into the cell where it is in high concentration.

c) requires very little energy expenditure on the part of nerve cells.

d) establishes concentration gradients across the cell membrane.

2) Membrane potentials are always expressed comparing the inside of the cell relative to the outside of the cell. The resting membrane potential is -70 mV because the inside of the cell accumulates ions with negative charges.

a) True

b) False

Expert Solution

Step 1

Neurons are the basic unit of the nervous system and are responsible for transmitting information to nerve cells, muscle or gland cells. The basic structure of neurons include the cell body, an axon, and dendrites.

Most neurons receive signals at the dendrites and soma (cell body) and they send this signal to other neurons through the axon.

Neurons are classified into three types based on its function.

Sensory neurons respond to external stimuli like light, sound, touch and are present majorly in the sensory organs of the body. After receiving the stimuli they send signals to the spinal cord or brain.
Motor neurons receive signals from the brain and spinal cord and control muscular movement and gland secretion of the body.
Interneurons connect neurons to other neurons within the same region of the brain or spinal cord.

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