Sherell has damaged her phrenic nerve after diving head-first into a shallow lake. Predict the effect on her pattern of ventilation
What will be an ideal response?
The phrenic nerve supplies the diaphragm with nerve impulses that promote inspiration. Without a viable connection to the ventral respiratory group (VRG) in the medulla, the rate of ventilation cannot be controlled. Sherell's diaphragm may not contract when needed and the rate of pulmonary ventilation will decrease.
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Which ligament of the knee initiates the knee-jerk reflex when tapped?
A) the patellar ligament B) the medial patellar retinacula C) the lateral patellar retinacula D) the extracapsular ligament
Identify the following
In excitation-contraction coupling, the transverse tubules function to:
a. conduct an action potential into the sarcoplasmic reticulum to cause release of calcium. b. uptake and store excess Na+ and K+ from the sarcoplasm. c. keep the thin and thick myofilaments separated. d. provide structural support for sarcomeres.
The protein that malfunctions in cystic fibrosis is a
A. potassium channel B. sodium pump C. chloride channel D. calcium pump