Joe finishes his run and starts walking back to his dorm. During his walk home,

Question

Joe finishes his run and starts walking back to his dorm. During his walk home, Joe stumbles upon a bear and screams like a little girl. Joe hears his scream because hair cells in the _____are activated and transmit action potentials to his auditory pathway over the _____branch of the vestibulocochlear nerve. A) organ of corti, vestibular B) macula, cochlear C) macula, vestibular D) crista, cochlear E) organ of corti, cochlear After screaming, Joe quickly turns around and runs as fast as he can. Rotational movement of Joe's head activates hair cells in the _____and information is transmitted to his central nervous system over the _____branch of the vestibulocochlear nerve. A) organ of corti, vestibular B) crista, cochlear C) macula, cochlear D) crista, vestibular E) macula, vestibular Joe is very fit (and very motivated) so he is able to reach his maximum running quickly. Joe's rapid acceleration activates hair cells in the _____and information is transmitted to his central nervous system over the _____branch of the vestibulocochlear nerve. A) crista, vestibular B) organ of corti, vestibular C) crista, cochlear D) macula, cochlear E) macula, vestibular Joe continues to run as fast as he can for one mile down the trail at which point he doesn't make a turn and runs off a small cliff. Just prior to Joe's unfortunate experience with gravity, the skeletal muscle in his legs were A) producing ATP by glycolysis. B) B and C C) A and B D) producing ATP by the tricarboylic acid (TCA)cycle (crebs cycle). E) using creatine phosphate to produce ATP from ADP Cardiac muscle and skeletal muscle are both striated muscles. During exercise, skeletal muscle can recruit more motor units to increase its contractile force but cardiac muscle not. Why? A) Cardiac muscle is not innervated. B) Because cardiac muscle cells have a shorter refractory period than skeletal muscle cells, therefore you can't recruit more cardiac muscle cells to contact. B) Because cardiac muscle cells have a longer refractory period than skeletal muscle cells, therefore you can't c recruit more cardiac muscle cells to contract. D) You can't activate one group of cardiac muscle cells without activating adjacent cells because they are connected through intercalated discs. E) Because cardiac muscle contains myoglobin and skeletal muscle does not.

Explanation / Answer

24 option is E

Organ of corti transduction of auditory signals into nerve impulses the collection of hairs also determine the pitch of sound heard by oneself and the variation in sound is distinguished by cochlear which sends electrical signal to brain.

25 Crista ampullaris sends information about head rotation and movement over cochlear which is coiled tube and transmits all information from ear to brain.

26 Correct answer is D macular sense the movements of body in acceleration and linear velocity and transmits signals over cochlear to vestibulocochlear nerve.

27 correct option is A and E skeletal muscled producing ATP by glycolysis and creation phosphate producing inorganic phosphate and ATP

28 option D you can't activate on group of cardiac muscle cells without activating adjacent cells because they are interconnected through intercalated cells which transmits nerve signals for contraction and relaxation of cardiac muscle s.

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