Human Anatomy and Physiology

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Questions and Answers

How does the synergistic action of skeletal muscles facilitate movement?

  • By providing the energy required for muscle contraction.
  • By directly opposing the movement initiated by the prime mover.
  • By acting as the primary force generating movement.
  • By stabilizing joints and neutralizing unnecessary movements. (correct)

What is the primary role of the myelin sheath in the nervous system?

  • To provide structural support to neurons.
  • To increase the speed of impulse transmission along the axon. (correct)
  • To synthesize neurotransmitters.
  • To remove waste products from the neuron.

What physiological response occurs when the diaphragm contracts?

  • The ribs move downward, reducing thoracic space.
  • Air is expelled from the lungs due to increased pressure.
  • The volume of the thoracic cavity decreases, aiding exhalation.
  • The volume of the thoracic cavity increases, aiding inhalation. (correct)

How does the circulatory system maintain blood pressure?

<p>By adjusting heart rate and blood vessel diameter. (A)</p> Signup and view all the answers

Which component of the skeletal system provides the primary protection for the brain?

<p>The cranium. (D)</p> Signup and view all the answers

What is the role of neurotransmitters at the synapse?

<p>Transmitting signals from one neuron to another. (C)</p> Signup and view all the answers

Why is the epiglottis important for the respiratory system?

<p>It prevents food and liquids from entering the trachea. (D)</p> Signup and view all the answers

How does the skeletal system assist in maintaining calcium homeostasis?

<p>By storing and releasing calcium as needed to maintain blood calcium levels. (D)</p> Signup and view all the answers

What is the primary function of the sinoatrial (SA) node?

<p>To initiate the electrical impulses that trigger heart contractions. (A)</p> Signup and view all the answers

Which of the following describes the role of sensory neurons in the nervous system?

<p>Detecting stimuli from the environment and transmitting them to the central nervous system. (D)</p> Signup and view all the answers

Flashcards

Nervous System

The body's control center, coordinating actions via electrical and chemical signals.

Skeletal System

Bones providing structure, protection, and enabling movement.

Muscular System

Responsible for movement, posture, and heat production.

Circulatory System

Transports oxygen, nutrients, and hormones throughout the body.

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Respiratory System

Facilitates gas exchange, taking in oxygen and releasing carbon dioxide.

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Tendons

Connective tissue that attaches muscle to bone.

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Ligaments

Connective tissue that connects bone to bone.

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Nervous System & Movement

Neurons send messages to control muscles.

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Gas Exchange

The process of breathing in oxygen and exhaling carbon dioxide

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