Flashcards in Biology Deck (27):
What is connective tissue?
Provide support/framework for epithelial cells; blood, bone, cartilage, tendons, ligaments, adipose tissues
What are the three main parts of Darwin's Theory of natural selection?
1. Organisms produce offspring of few survive. Chance variations within populations are heritable.
2. If the variation increases an organism's survival chances, the variation is termed favorable.
3. These individuals will have greater fitness (reproductive success) and fitness is directly correlated to organism's genetic contribution to the next generation.
What are the layers of the skin?
Epidermis, dermis, hypodermis
What are the layers of the epidermis?
Corneum (dead skin cells, protection
Lucidum (thick, hairless, hells of palms)
Granulosum (keratonocytes die)
Spinosum (langerhancells, macrophages, present antigens to T- cells)
Basale (stem cells=> keratinocytes; melanocytes --> skin color)
What are the layers of the dermis?
Papillary- loose connectice tissue
Reticular- hair follicles, sweat glands, blood vessels
What does the hypodermis contain?
Fat = connective tissue
What are the sensory receptors of dermis?
Merkel- deep pressure + tecture
Pacinian- deep pressure + vibration
Meissner's - light touch
Where is the electron transport chain located in prokaryotes?
What is the molecular weight of an amino acid?
What is commensalism?
one benefits; the other doesn't but doesn't harmed either
What is mutualism?
What is parasitism?
one benefits; the other is harmed
What is senescence?
biological aging in which cells no longer replicate (shortened telomeres)
What does the ectoderm form?
epidermis, NS, adrenal medulla
What does the mesoderm form?
dermis, musculoskeletal system, circulatory system, adrenal cortex
What does the endoderm form?
epithelial lining of GI and resp systems
What is induction?
The release of factors that promote differentiation in other tissues (can be reciprocal)
What cells produce myelin in the CNS?
What cells produce myelin in the ONS?
upstream and downstream a gene
upstream is before the gene; downstream is after the gene
bone-forming cells (build)
bone-resorbing cells (breakdown)
increases blood pressure but decreases oxygen delivery to those tissues
the movement of fluid through the circulatory or lymphatic system, specifically the delivery of blood to capillary beds in tissues
hydrolyze ATP to power sarcomere contract
Kinesins and Dyneins
motor proteins involved in intracellular transport; deliver vesicles along MT's (kinesins towards + and dyneins toward - )