200RGANIZATION.pdf 1. The thyroid is an endocrine gland situated beneath the Ada
ID: 3506657 • Letter: 2
Question
200RGANIZATION.pdf 1. The thyroid is an endocrine gland situated beneath the Adam's apple in the anterior neck. it secretes various types of thyroid hormones that regulate metabolism. Based upon the aforementioned description, which of the following epithelia would you expect to find in the thyroid? a. Simple squamous b. Cliated pseudostratified columnar Nonciliated pseudostratified columnar d. Simple cuboidal e. Stratified cuboidal 2. Which of the following is not a characteristic of non-keratinized stratified squamous epithelium? a Multiple cell layers b. Tile-ike apical cells c. Superficial cells are alive d Deepest ells rst on basement membrane e. Absence of nuclei in apical cells 3. Earwax, or cerumen, is a substance secreted in the ear canal that functions to protect, clean, and lubricate. Which type of gand is a ceruminous gland? a. Merocrine b. Apocrine c. Holocrine d. Endocrine e. Paracrine 4 Connective tissue contains cells that are permanent, resident cels, and cells thut respond to damage, wandering cells, and are therefore only transiently found. Which of the following is a transient cell of the connective tissue proper? a. Fibroblast b. Adipocytes c. Mesenchymal cells d. Fixed macrophages e. Free macrophages S. When viewing connective tissue using microscopy you notice many wavy black ines throughout the sample. what are these black lines? Coll agen fibers c Elastic fibers e. Intercalated dscsExplanation / Answer
Que.1
Answer: d)simple cuboidal epithelium.
a)simple squamous epithelium.
[Explaination: simple cuboidal epithelium is the epithelium thyroid gland consist of when it is in active form whereas when it is in inactive form the epithelium is simple squamous epithelium. Most of the time when we talk about the thyroid gland we talk about its active form. So, the best choice would be simple cuboidal epithelium .
All the other options are not possible.]
Que.2
Answer:e) absence of nucei in apical cells.
[Explanation: The difference between the keratinized and non keratinized do not lie in the absence or presence of keratin, as keratin is present in both type of tissue. But the difference lies in the amount of keratin present.
a) multiple cell layers are present both in keratinized and non keratinized.
b) cell shape is same for both
c) superficial cells are alive in non keratinized stratified epithelium wheres the superficial cells are dead in keratinized stratified epithelium.
d) deepest cells rest on the basement membrane and the all other layers stick in order to maintain structural integrity.
So, "e)absence of nuclei" is not the right characteristic of non keratinized stratified epithelium as it has nuclei.
Que.
Answer: b) apocrine gland
[Explanation: ceruminous glands are specialised sweat glands and they are classed as apocrine glands. Apocrine glands are type of exocrine glands which bud their secretions off through plasma membrane.
a)merocrine are also type of exocrine glands which secret ther secretion through exocytosis.
C)the products of holocrine are secreted along with dead cells.
d) endocrine gland is a diffrent class in which hormones are directly secreted into the blood whereas the ceruminous gland is an exocrine gland in which non hormone secretion into the ducts to the external environment takes place.
e)paracrine glands are the glands which facilitates diffusion of local hormones to other cells.]
Que.4
Answer: c) mesenchymal cells are transient cells of connective tissue.
[Explanation: all the other cells are permanently located cells whereas mesenchymal cells are the cells which are wandering or transient.]
Que.5
Answer:c)elastic fibres
Elastic fibres are the black lines appear in sample of connective tissue in microscope .
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