Anatomy & Physiology Flashcards
7 cards from real ACSM practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Anatomy & Physiology flashcards as text
The oxygen-hemoglobin dissociation curve shifts rightward in response to which condition?
Answer: Increased 2,3-DPG
Increased 2,3-DPG, along with decreased pH, increased CO2, and increased temperature, shifts the curve right, promoting O2 unloading to tissues.
Which of the following bones is part of the axial skeleton?
Answer: Sternum
The sternum is part of the axial skeleton, which includes the skull, vertebral column, and thoracic cage.
Muscle spindles primarily detect changes in which property of skeletal muscle?
Answer: Muscle length and rate of length change
Muscle spindles (intrafusal fibers) are stretch receptors sensitive to changes in muscle length and the velocity of that length change.
The left ventricle pumps blood into which vessel?
Answer: Aorta
The left ventricle ejects oxygenated blood into the aorta for systemic circulation.
Which type of cartilage covers the articulating surfaces of synovial joints?
Answer: Hyaline cartilage
Hyaline cartilage provides a smooth, low-friction surface on the articulating ends of bones in synovial joints.
Which hormone is primarily responsible for regulating blood calcium levels in conjunction with vitamin D?
Answer: Parathyroid hormone (PTH)
Parathyroid hormone raises blood calcium by stimulating bone resorption, kidney reabsorption, and vitamin D activation.
During inspiration, the diaphragm contracts and moves in which direction?
Answer: Inferiorly
Diaphragm contraction causes it to flatten and descend inferiorly, increasing thoracic volume and drawing air into the lungs.