LABS AND EXTRA PROGTEST1 Flashcards
Radiation:
causes heat loss in the form of inferred rays. Electromagnetic.
• will radiate rays if not absolutely 0 temp
• 60% of heat is lost to radiation
• Body radiates heat to room and room radiates heat back - mostly from body tho
Conduction:
Conduction: involves the transfer of heat to objects or media with which we are in contact
• not much is conducted to solid objects but a lot 15% is conducted to surrounding media
• One skin equal to air - no more transfer occurs
Convection
Convection: involves the transfer of heat to air or water followed by the movement of air or water away from the skin which maintains the gradient for heat loss from the body
Evaporation:
Evaporation: when water is evaporated from the body surface the heat energy requires to cause the water to evaporate is also lost. Even if a person is not swearing water will still evaporate in sensibly
• evaporation is particularly important in situations when the environmental temperature is greater then body temperature - in these circumstances the body will GAIN heat by radiation and conduction/convection and also sweating becomes the only mechanism by which the body can rid itself of heat
Does body lose heat faster to water or air
Water
Where are tactile corpuscles especially found
- papillary dermis
- hairless skin
- fingertips
Structure of corpuscles
Spiralling / branching umyelinated sensory terminals surrounded by modified Schwann cells and then by a thin oval fibrous connective tissue capsule
What are bulbous corpuscles sensitive to?
• sensitive to sustained deep pressure and stretching or distortion of the skin
• Important for signalling continuous states of deformation of the tissues such as heavy prolonged touch and pressure signals
Why is eating and drinking prohibited in the hubs lab
• because it is a PC (physical containment) lab and there may be hazardous or pathogenic substances present
Why are cellphones not allowed in labs
human tissue act prevents people from photographing human tissues as it was not conceited to when he bodies were donated.
Structure that separates thoracic cavity from the abdominopelvic cavity
Diaphragm
Sections of the thoracic cavity
3 - two pleural cavities with lungs and mediasternum
Names of the serous membranes associated with different structures
The lungs: pleura
The heart: pericardium
Some organs of the GI tract: peritoneum
Function of the epithelium of the dermis
Protection
Where else is stratified squamous epithelium found
Oral cavity and the asophagous
No free nerve endings in the outer layer of epidermis
Yes
The deeper you get in the dermis…
… the more firmly cells are held together
Where are melanocytes found
Stratum basale
Is it more dangourus to have meloma in the dermis or the epidermis
It is more dangerous to have a melanoma is the dermis then the epidermis. This is because the dermis is. not continually replaced like the epidermis and also because the dermis sits closer to the blood stream and lymphatics making it easier to metastasise
What sensory fibres are found deep in the dermis
- lamellar
- bulbous
- free nerve endings
Function of hair
- protection
- thermoregulation
- touch sensations
Main function of sweat
Thermoregulation
Where are eccrine most highly concentrated
Plans and soles
What is the basic tissue type modifies to form sweat glands and sebaceous glands
Epithelium
Main function of sweat
Thermoregulation
Sensory and control centre for thermoregulation
Hypothalamus - peroptic
Does core body temp change in exercise
No
What happens during excerise to maintain core body temp
Sweating - evaporation of sweat is an exothermic process where heat is transferred from the skin to the environment
Due to vascular dialation at skin surface - red skin. Allows for rapid transfer of heat from core to the periphery and increased heat loss from the body to the environment through radiation, convection and conduction
S hape of red b cell
- large SA:V ratio - efficient diffusion of gas
- some flexibility
which artery branches to become the right subclaivian artery artery and right corotiod artery?
The brachiocephalic
Places you can feel pulse
Places u can feel pulse:
• superficial temporal
• Carotid
• Radial
• Dorsalis pedis
Why MAP is so essential
To maintain adequate perfusion of vital organs above and below the heart, such as the Brian, kidneys, lungs and the heart itself
Eccrine
Exocrine secretions are secretions that are transported from inside of the body to the outside of the body (compared with endocrine secretions, which are transported into the bloo
