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3 years ago

Skin surfaces that lack hair contain specialized epithelial cells called which are sensitive to touch

1 answer:

nataly862011 [7]3 years ago

7 0

The answer is Merkel cells (Merkel-Ranvier cells or tactile epithelial cells). They are mostly found in the tips of the fingers, soles, oral, stratum basale of the palms, and genital mucosa, and nail bed, where touch is most sensitive. They are associated with nerve endings

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Autopsy conducted on an individual who had died of pneumonia revealed bluish-green pus filling the lung. The causative agent of

Rus_ich [418]

Answer:

The agent causing the pneumonia, where bluish-green pus was found, is most likely Pseudomonas aeruginosa.

Explanation:

Pseudomona aeuriginosa is a gram-negative bacteria that is one of the main causes of hospital-acquired infections, including pneumonias in mechanically ventilated patients.

One of the characteristics of P. aeuriginosa is the formation of a bluish-green pus, since it has the capacity to form cyanide-based blue pigment upon contact with the organic tissues it infects. This is the reason why previously P. aeruginosa was called a pyocyanic bacillus.

The other options are not correct because the only bacterium that produces blue-green pus is P. aeruginosa.

7 0

2 years ago

(04.01 LC) Which level of organization is formed from two or more different tissues that group together and perform a function?

Colt1911 [192]

The correct answer is the organ.

The multicellular species are formed of various parts, which are required for survival. These parts are differentiated into the levels of the organization. There are five different levels, which are named as cells, tissue, organs, organ systems, and organisms.

When two or more layers of tissue function together, they produce an organ. All the animals comprise vital organs, without which they cannot survive. These include the kidneys, liver, lungs, brain, and heart.

8 0

3 years ago

Read 2 more answers

Which hormone is secreted during periods of stress and is related to increased risk of disease?

gulaghasi [49]

Stress is a condition that tends to disturb the equilibrium of the individual with the environment. There are hormonal changes which occur during stress and have their impact in the endocrine system.

Reaction to stress is associated with increased hormone secretions of several hormones such as glucocorticoids, growth hormone, prolactin and catecholamine. The elevated levels of these hormones increase the risk of infections and also decrease the innate immunity as well as increase the autoimmune responses.

There are endocrine disorders related with the increased hormone secretion during stress conditions such as psychosexual dwarfism, obesity, Grave’s disease and gonadal dysfunction. The effect of increased secretion of the hormones is increase in mobilization of energy and adaption of the individual to current circumstances.

Activation of the pituitary adrenal axis is an important and dominant response due to stress. On stimulation of the pituitary adrenal axis results in hypothalamic secretion of the CRF (corticotrophin-releasing factor) which further stimulates the pituitary to ACTH, 3-endorphin and 8-lipotropin.

During stress, the plasma levels of these hormones increase up to five times.

The stimulation of the pituitary adrenal axis is also associated with the release of hormone catecholamine. The increased level of catecholamine leads to increased skeletal muscle flow of blood increased cardiac output and glucose levels, bronchiolar dilation, cutaneous vasoconstriction etc.

Acute stress releases vasopressin rapidly from the Para ventricular nucleus of hypothalamus together with corticotrophin releasing hormone.

During stress there is also suppression of gonadotropins and gonadal steroidal hormones which disrupt the normal menstrual cycle and prolonged stress can also lead to impairment of reproductive functions.

Thyroid functions are down regulated during stress conditions. T3 and T4 levels decrease whenever there is any stress condition.

The growth hormone level increases due to physical stress and prolactin level may increase or decrease depending on the conditions of regulatory environment locally.

4 0

3 years ago

When a goose spots an egg outside of its nest, the goose gets out of the nest and rolls the egg back. Once started, a goose cont

kompoz [17]

Answer: A Fixed Action Pattern

Explanation:

A fixed action pattern is an ethological term and off course a natural activity pattern that causes animals to act in a specific behavior pattern distinctive to their species. It is a pattern that is relatively unchangeable within the species and usually ends even when it is interrupted. You can say that, it is innate releasing mechanism or network where sign stimulus exists, once released from neural network; fixed action pattern leads to completion as well.

7 0

3 years ago

Which is a closed system.a tree, a human ,a clock , or a car

melomori [17]

A closed system is a system that makes no physical or chemical exchanges with its environment. Of these systems provided as choices (tree, human, clock, car), only a clock does not make exchanges with the environment, except for energy.
Therefore, of that list, only a clock would be a closed system.
Hope that helped! =)

4 0

3 years ago