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TLS Online TPP Program

#Question id: 12071

The most serious hypokalemia would occur in which of the following conditions?

#Unit 7. System Physiology – Animal
  1. Decrease in potassium intake from 150 to 60 mEq/day
  2. Increase in sodium intake from 100 to 200 mEq/day
  3. Fourfold increase in aldosterone secretion plus high sodium intake
  4. Fourfold increase in aldosterone secretion plus low sodium intake
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TLS Online TPP Program

#Question id: 5237

#Unit 5. Developmental Biology

Match the following stem cell type (Column I) with their niche location (Column II).

     Column I

Column II

A. Intestine

i. Bone marrow

B. Hematopoietic stem cells

ii. Bulge

C. Hair follicle

iii. Testes

D. Sperm

iv. Base of small intestinal crypts

Which of the following is correct?
TLS Online TPP Program

#Question id: 5238

#Unit 5. Developmental Biology

all tissue types possess a unique stem cell niche, and despite many differences among the niche architecture of different tissues, several common principles of stem cell regulation can be applied to all environments. These principles involve extracellular mechanisms leading to intracellular changes that regulate stem cell behavior.

Column A

Column B

I. Extracellular regulatory mechanisms

i. Regulation by endocrine, paracrine, or juxtacrine mechanisms

II. Intracellular regulatory mechanisms

ii. Regulation by a network of transcription factors

iii. Epigenetic regulation

iv. Regulation by cell-to-cell and cell-to-matrix adhesions

v. Regulation by cytoplasmic determinants

Match the following regulatory mechanism (column A) with the factors that regulate stem cell behavior (column B).
TLS Online TPP Program

#Question id: 5254

#Unit 5. Developmental Biology

Following signal transduction pathways can be grouped into several basic types, based on the sequence of intracellular events.

According to above figure, which of the following correctly represents the basic concepts of all signalling pathway?
TLS Online TPP Program

#Question id: 14706

#Unit 5. Developmental Biology

Match the types of cell movement during gastrulation
TLS Online TPP Program

#Question id: 14707

#Unit 5. Developmental Biology

Which of the following organ belongs to the internal layer of gastrula?
TLS Online TPP Program

#Question id: 14708

#Unit 5. Developmental Biology

Difference between gastrulation in Xenopus and sea urchin;
I. In Xenopus, formation of blastopore: mesoderm and endoderm move inside by involution over blastopore lip.
II. In sea urchin, formation of blastopore: mesodermal cells migrate into the interior; endoderm moves inside by invagination of the epithelial sheet.