In drosophila, Physical forces drive invagination of the ventral furrow. Following statements regarding to this process:

A. The cellularized blastoderm will begin to activate higher levels of myosin in the cells at the ventral midline and preferentially at their apical surface.

B. Epithelial adhesions paired with differential activation of dynein and tissue geometry create mechanical constraints that affect the orientation of actomyosin meshworks.

C. The A/P oriented arrays of myosin in the cells at the ventral midline generate tension along the anterior-posterior axis.

D. The combination of tissue geometry and tension of these anterior-to-posterior meshworks cause the tissue to fold outward at a right angle to the anterior-posterior axis, creating a long and narrow ventral furrow.

Which of the following statements are incorrect?

TLS Online TPP Program

#Question id: 24458

#Unit 7. System Physiology – Animal

Which of the following is not correctly paired?

TLS Online TPP Program

#Question id: 24459

#Unit 7. System Physiology – Animal

The correct sequence of events involved in phototransduction in rods and cones in response to light is:

TLS Online TPP Program

#Question id: 24460

#Unit 7. System Physiology – Animal

A 25-year-old medical student spent a summer volunteering in the sub-Saharan region of Africa. There he noted a high incidence of people reporting difficulty with night vision due to a lack of vitamin A in their diet. Vitamin A is a precursor for the synthesis of

TLS Online TPP Program

#Question id: 24461

#Unit 7. System Physiology – Animal

An 11-year-old male was having difficulty reading the graphs that his teacher was showing at the front of classroom. His teacher recommended he be seen by an ophthalmologist. Not only was he asked to look at a Snellen letter chart for visual acuity but he was also asked to identify numbers in an Ishihara chart. He responded that he merely saw a bunch of dots. Abnormal color vision is 20 times more  common in men than women because most cases are caused by an abnormal

TLS Online TPP Program

#Question id: 24462

#Unit 7. System Physiology – Animal

Which of the following is not involved in color vision? 

TLS Online TPP Program

#Question id: 24463

#Unit 7. System Physiology – Animal

A 56-year-old female was diagnosed with a tumor near the base of the skull, impinging on her optic tract. Which of the following statements about the central visual pathway is correct?