Cell Junctions

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During which period does the zygote undergo rapid cleavage cell divisions?

Germinal period (correct)

Extraembryonic period

Blastocyst formation

Implantation

What is the structure formed by the blastomeres within 72 hours of fertilization?

Embryoblast

Morula (correct)

Blastocyst

Trophoblast

Which layer of the blastocyst will later develop into the three germ layers of the embryo?

Epiblast (correct)

Trophoblast

Amnion

Hypoblast

What is the function of the trophoblast in the blastocyst?

Provide nutrients to the embryo Signup and view all the answers

When does implantation of the blastocyst occur?

5 to 7 days following fertilization Signup and view all the answers

Which extraembryonic membrane surrounds all other extraembryonic membranes and develops into the fetal part of the placenta?

Chorion Signup and view all the answers

From which layer do the yolk sac and future gut develop?

Hypoblast Signup and view all the answers

Which type of connective tissue has a loose arrangement of protein fibers and contains fibrocytes and fibroblasts?

Areolar Signup and view all the answers

What is the main function of adipose tissue?

To store triglycerides Signup and view all the answers

Which type of dense connective tissue has fibers arranged irregularly?

Dense irregular Signup and view all the answers

What is the main component of the matrix in cartilage?

Proteoglycans Signup and view all the answers

Which type of bone contains a lattice of thin threads called trabeculae?

Spongy bone Signup and view all the answers

What is the main component of the matrix in blood?

Plasma Signup and view all the answers

Which type of muscle tissue is striated?

Skeletal Signup and view all the answers

What is the main function of nervous tissue?

To conduct electrical impulses Signup and view all the answers

What is the main function of cutaneous membranes?

To protect the skin Signup and view all the answers

Which type of cell junction allows for ions and small molecules to freely pass between neighboring cells?

Gap junctions Signup and view all the answers

Which type of epithelial tissue covers the body surface and lines the body cavities?

Simple epithelium Signup and view all the answers

Which type of epithelial tissue is more than one layer thick and provides physical, chemical, and biological protection?

Stratified epithelium Signup and view all the answers

Which type of epithelial tissue has cells that reach different heights and nuclei at different levels, but all cells sit on the basement membrane?

Pseudostratified epithelium Signup and view all the answers

Which type of epithelial cell is flat and fish-scale-like, and is used for rapid diffusion or filtration of substances, or for resisting abrasion?

Squamous Signup and view all the answers

Which type of epithelial cell is cube-shaped and is used for secretion and absorption, such as in the kidneys?

Cuboidal Signup and view all the answers

Which type of epithelial cell is column-shaped, tall and thin, and is used for secretion and absorption of mucous, enzymes, and other substances, such as in the digestive tract?

Columnar Signup and view all the answers

Which of the following is true about the allantois?

It develops into the umbilical cord and the urinary bladder Signup and view all the answers

During the embryonic period, which of the following develops into the nervous system and the epidermis of the skin?

Ectoderm Signup and view all the answers

Which period of development is characterized by the almost full development of general human characteristics and major organ systems?

Fetal period Signup and view all the answers

What is the difference between genotype and phenotype?

Genotype refers to the genetic makeup of an individual, while phenotype refers to the observable expression of genetic traits Signup and view all the answers

Which of the following is an example of homozygous alleles?

BB Signup and view all the answers

What is the probability of offspring having curly hair if one parent has heterozygous alleles for curly hair (Cc) and the other parent has straight hair (cc)?

50% Signup and view all the answers

Which tissue type is responsible for sensory and signaling functions?

Nervous tissue Signup and view all the answers