B. Send signals to skeletal muscles
C. Have axons extending into peripheral nerves
A. Send signals to visceral smooth muscle
B. Send signals to skeletal muscles
C. Have axons extending into peripheral nerves
The inflation (Hering-Breuer) reflex is a potentially dangerous response that may cause overinflation of the lung
Indicate whether the statement is true or false
Arrange the following steps of muscle fiber contraction in the correct sequence.1. The muscle impulse reaches the sarcoplasmic reticulum and calcium is released.2. Thin filaments are pulled over the thick filaments.3. Calcium floods the sarcoplasm and binds to troponin molecules leaving active sites.4. The impulse arrives at the synapse and travels through the transverse tubules.5. The muscle fiber shortens and contracts.6. Myosin heads bind to exposed active sites on actin, forming cross-bridges.
A. 4, 1, 3, 5, 6, 2 B. 4, 3, 6, 2, 5, 1 C. 4, 1, 3, 6, 2, 5 D. 4, 1, 3, 2, 6, 5
Chemoreceptors are located in all of the following except
A) carotid bodies. B) aortic bodies. C) the skin. D) the organs of taste. E) the organs of smell.
What is the maturation process in which spermatids elongate and shed excess cytoplasm?
A) spermiogenesis B) spermatogenesis C) meiosis II D) meiosis I