BIO 264 Study guides, Class notes & Summaries

BIO 264 FINAL EXAM 2024 WITH 100% CORRECT ANSWERS Once excitation-contraction coupling has occurred, calcium ion concentration increases dramatically in the: a. sarcoplasmic reticulum b. cytosol of the muscle fiber c. sarcolemma d. terminal cisterna e. there is no change in calcium concentration - correct answer b. cytosol of the muscle fiber As Lisa drove home, she was suddenly alerted to the sound of a blaring horn and realized she had drifted off to sleep. Which nervous system ...

BIO 264 EXAM 1 2024 WITH 100% CORRECT ANSWERS In order to produce two equal halves that are mirror images of each other, the human body would need to be split along which plane? - correct answer Sagittal Which one of the following planes divide the shin and the calf? - correct answer Frontal The eye is ______ to the ear - correct answer medial The foot is _______ to the knee - correct answer distal The shoulder is _______ to the elbow - correct answer proximal The spinal col...

BIO 264 EXAM 5 2024 WITH 100% CORRECT ANSWERS Which is NOT a function of the hypothalamus? A) helps control heart rate and blood vessel diameter B) assists in the regulation of osmolarity of the blood C) stimulates shivering D) coordinates smooth flowing muscular movement - correct answer D) coordinates smooth flowing muscular movement Which structure is considered the sensory relay center of the brain? - correct answer thalamus Which of the following is false? A) T...

BIO 264 EXAM 1 2024 WITH 100% CORRECT ANSWERS In order to produce two equal halves that are mirror images of each other, the human body would need to be split along which plane? Question options: 1) The frontal plane 2) The coronal plane 3) The transverse plane 4) The sagittal plane - correct answer 4) The sagittal plane Which one of the following planes divide the crural (shin) and sural (calf) regions of the body? Question options: 1) frontal plane 2) sagittal plane...

BIO 264 FINAL REVIEW EXAM 2024 WITH 100% CORRECT ANSWERS Captain Jack Sparrow is in a sword fight with an evil skeleton pirate. If Jack were to cut off the skeleton's head, his sword would be following which body plane: - correct answer transverse Which of these statements about positive feedback is the MOST correct? - correct answer Birth is an example of a normally occurring positive feedback mechanism. Which of the following is NOT an example of a negative feedback loop? - correct a...

BIO 264: EXAM 2 REVIEW 2024 WITH 100% CORRECT ANSWERS Which ion has greatest influence on resting membrane potential? - correct answer Potassium (potassium has more leak channels on the membrane than sodium, which is why potassium has a higher permeability value and has more impact of resting membrane potential) Concerning resting membrane potential, the inside of the membrane is _______ compared to the ________ charged outside. - correct answer negative, positively. T or F: The dif...

The upper motor neurons are axons that carry action potentials from the upper brain (cerebrum) to the brainstem or spinal cord A reflex is an automatic response to a stimulus produced by a reflex arc The lower motor neurons have cell bodies in the anterior horns of the spinal cord and in the brainstem These are all properties of reflexes except __________. A) reflex responses are very predictable. B) reflexes are responses to sensory inputs

What structure runs from Z line to Z line? Sarcomere The movement of the troponin-tropomyosin complex requires _______ Ca2+. The actin filament is a polymer formed from 300 to 400 globular subunits called ______ Gactin. A myofilament is the _________. Protein strand composed of actin or myosin T tubules ________. Conduct action potentials deep into the muscle cell A drug that interferes with the active transport of calcium ions from the sarcoplasm back into the sarcoplasmic reticulum would...

Which ion has greatest influence on resting membrane potential? Potassium (potassium has more leak channels on the membrane than sodium, which is why potassium has a higher permeability value and has more impact of resting membrane potential) Concerning resting membrane potential, the inside of the membrane is _______ compared to the ________ charged outside. negative, positively. T or F: The diffusion of K+ and Na+ down their chemical gradients contributes to the resting membrane potenti...